# CVE-2021-3736: linux: A flaw was found in the Linux kernel

CVE-2021-3736 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-3736, released August 23, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-3736
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 23, 2022

## Description

A flaw was found in the Linux kernel. A memory leak problem was found in mbochs_ioctl in samples/vfio-mdev/mbochs.c in Virtual Function I/O (VFIO) Mediated devices. This flaw could allow a local attacker to leak internal kernel information.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.6-1 | [DEBIAN-CVE-2021-3736](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3736.md) | Aug 23, 2022 |
| Linux | linux Debian 13.5 (trixie) | 5.14.6-1 | [DEBIAN-CVE-2021-3736](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3736.md) | Aug 23, 2022 |
| Linux | linux Debian 14 | 5.14.6-1 | [DEBIAN-CVE-2021-3736](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3736.md) | Aug 23, 2022 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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